- COMFORTABLE & SKIN-FRIENDLY: Our Silicone Loop Band for WHOOP 4.0/5.0 features a soft-touch design made from non-irritating, odorless material, providing all-day comfort for your active lifestyle. (This silicone wristband does not interfere with charging and does not need to be removed) Yeahxing Silicone Loop Band for WHOOP 4.0 - Sports Wristband Compatible with Whoop 5.0 Straps - Soft-Touch, Waterproof and Sweatproof, Easy to Use and Adjustable, for Wrist Size 4.9 Inch~8.9 Inch